function hover() {
	var tabs = document.getElementById("mainTabs").getElementsByTagName("LI");
	for (var i=0; i<tabs.length; i++) {
		tabs[i].onmouseover=function() {
			this.className+=" hover";
			//alert ("over");
		}
		tabs[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" hover\\b"), "");
		}
	}
}


window.onload = function()
{
	//Set a variable that is window.fieldId equal to the value of the textfield to establish a string to fall back to if the field is left empty onBlur
	if(document.getElementById)
	{
		window["searchField" + "Start"] = document.getElementById('searchField').value;
	}
}
			
function searchFocus(fieldEl)
{
	if(document.getElementById)
	{
		if(document.getElementById(fieldEl.id).value == window[fieldEl.id+"Start"])
		{
			document.getElementById(fieldEl.id).value = '';
		}
	}
}
			
function searchBlur(fieldEl)
{
	if(document.getElementById)
	{
		if(document.getElementById(fieldEl.id).value == "")
		{
			document.getElementById(fieldEl.id).value = window[fieldEl.id+"Start"];
		}
	}
}

function addEvent(obj, evType, fn){ 
	if (obj.addEventListener){ 
		obj.addEventListener(evType, fn, false); 
		return true; 
	} 
	else if (obj.attachEvent){ 
		var r = obj.attachEvent("on"+evType, fn); 
		return r; 
	}
	else { 
		return false; 
	} 
}


function linkPreview(){
	var links = document.getElementsByTagName("a");

	for (i=0; i<links.length; i++){
		var currentLink = links[i];
		var	images = currentLink.getElementsByTagName("img");
		
	 	// Check if the link is an image. We don't want icons next to images.
		if (images.length == 0){
			var linkHref = currentLink.href;
			
			// Find all links directed to amazon.com 
			if (linkHref.match(/amazon.com/)){
				append(currentLink, "amazon");
			}
			else{
				checkLinks(linkHref, currentLink)
			}
		}
	}
}


function checkLinks(linkHref, currentLink){
	var linkHrefParts = linkHref.split(".");
	
	// extension is the last element in the LinkSplit array
	var extension = linkHrefParts[linkHrefParts.length - 1];
	
	// In some browsers there is a "/" placed after the link. removes the "/"
	extension = extension.replace("/","");
	
	if( extension in { doc:1, pdf:1, ppt:1, txt:1, xls:1, zip:1 } ){
		append(currentLink, extension );
	}
}

function append(currentLink, extension){
	var span = document.createElement('span');
	span.innerHTML = "&nbsp;";
	currentLink.parentNode.insertBefore(span,currentLink.nextSibling);
	span.className = extension;
}

if (window.attachEvent) window.attachEvent("onload", hover);
addEvent(window, 'load', linkPreview);